LUPTON : SOME NOTES ON THE YORKSHIRE COALFIELD. 433 
Figure I. is a plan of the Coalfield showing the outcrops of three 
of the best known seams of Coal, also the Millstone Grit below. The 
outcrops of the Permian, New Red Sandstone, Lias and Oolite are 
also shown. 
Figure II. is a longitudinal section from north to south of the 
Coalfield, along a line drawn through some of the collieries. The 
total length of the section is sixty-eight miles. 
Transverse sections were also shown, one across the Coalfield 
from west to east in North Derbyshire, and another from west to 
east along a line of latitude about two miles south of Leeds. 
These two transverse sections, one on the extreme north 
and the other on the extreme south of the Yorkshire Coalfield 
agree in showing a continuous dip from west to east, except the 
eastern end of the northern section, where a slight eastwardly 
rise has been noted. The question is, is this eastwardly rise merely 
a local variation or does it mark the beginning of the general east- 
wardly rise which will be continued till the coals crop out against 
the lower surface of the Permian formation. Everybody admits that 
the Coalfield ends somewhere before the coasts of Denmark are 
reached. 
Those who are most sanguine think that the Coalfield extends 
under the whole of Lincolnshire. Others think the river Trent repre- 
sents the eastern boundary of the Coalfield. 
It may be interesting to consider for a few moments how far the 
evidence that now exists throws any light upon this problem. 
There are three important boreholes. No. 1 is the deep boring 
for coal at Scarle. No. 2 is the boring near Carlton and Snaith, and 
No. 3 is the boring near Haxey, between Doncaster and Gainsborough. 
The Scarle boring reached a depth of 2,030 feet, and passed through 
1,425 feet of New Red Sandstone ; the strata at the bottom of the 
borehole were never fully identified. The boring near Scnrle, what- 
ever it proved, has not yet led to any further developments, and the 
details have not been published. The boring near Haxey has reached 
a depth of nearly 1,100 yards, and it has been publicly stated that 
a seam of coal supposed to be the Barnsley bed has been found at 
that great depth. 
